37660421 has 2 divisors, whose sum is σ = 37660422. Its totient is φ = 37660420.

The previous prime is 37660409. The next prime is 37660429. The reversal of 37660421 is 12406673.

37660421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37576900 + 83521 = 6130^2 + 289^2 .

It is an emirp because it is prime and its reverse (12406673) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37660421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37660429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18830210 + 18830211.

It is an arithmetic number, because the mean of its divisors is an integer number (18830211).

Almost surely, 2^37660421 is an apocalyptic number.

It is an amenable number.

37660421 is a deficient number, since it is larger than the sum of its proper divisors (1).

37660421 is an equidigital number, since it uses as much as digits as its factorization.

37660421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 37660421 is about 6136.8086983382. The cubic root of 37660421 is about 335.1930898424.

The spelling of 37660421 in words is "thirty-seven million, six hundred sixty thousand, four hundred twenty-one".